We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Your support keeps us free & ad-free » Donate
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sunny DaytimeWhat's Visible Now?
All Constellations » Crux » 

Mimosa - β Crucis (beta Crucis)

Altitude: -65.8°   Azimuth: 234.1°   Direction: South-West

Mimosa, also designated as β Crucis (beta Crucis), is a variable and multiple hypergiant star in the constellation of Crux.

Mimosa visual magnitude is 1.25, making it the 19th brightest star in the sky. Thanks to its high brightness, Mimosa is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

The proper motion of Mimosa is -0.048 arcsec per year in Right Ascension and -0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Mimosa - β Crucis (beta Crucis) star
DSS2 image of Mimosa. The red arrow shows the motion of Mimosa during the next 10000 years (-8.00 arcmin in Right Ascension and -2.33 arcmin in declination);

Key facts about Mimosa


Mimosa - β Crucis (beta Crucis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -65.8°
Azimuth: 234.1°
Direction: South-West

Celestial coordinates and finder chart of Mimosa

Mimosa is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Mimosa are provided in the following table:

12h 47m 43s
-59° 41’ 18”

The simplified sky map below shows the position of Mimosa in the sky:

Finder chart Mimosa - β Crucis (beta Crucis) star
Simplified finder chart for Mimosa - β Crucis (beta Crucis).

Visibility of Mimosa from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Mimosa - β Crucis (beta Crucis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of Mimosa from the Sun and relative movement

Mimosa is distant 352.43 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

108.11 pc
352.43 ly
16 km/s
-0.048 arcsec/year
-0.014 arcsec/year

Spectral properties of Mimosa

Mimosa belongs to spectral class B0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where Mimosa is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Mimosa. Attribution: Richard Powell / CC BY-SA

Mimosa star system properties

Mimosa is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Mimosa double sysyem:

371.6 arcsec

Alternative designations of Mimosa

β Crucis
(beta Crucis)